# CancelParticipantAuthentication


Cancels the authentication session. The opted out branch of the Authenticate Customer flow block will be taken.

**Note**  
The current supported channel is chat. This API is not supported for Apple Messages for Business, WhatsApp, or SMS chats.

**Note**  
 `ConnectionToken` is used for invoking this API instead of `ParticipantToken`.

The Amazon Connect Participant Service APIs do not use [Signature Version 4 authentication](https://docs.aws.amazon.com/general/latest/gr/signature-version-4.html).

## Request Syntax


```
POST /participant/cancel-authentication HTTP/1.1
X-Amz-Bearer: ConnectionToken
Content-type: application/json

{
   "SessionId": "string"
}
```

## URI Request Parameters


The request uses the following URI parameters.

 ** [ConnectionToken](#API_connect-participant_CancelParticipantAuthentication_RequestSyntax) **   <a name="connect-connect-participant_CancelParticipantAuthentication-request-ConnectionToken"></a>
The authentication token associated with the participant's connection.  
Length Constraints: Minimum length of 1. Maximum length of 1000.  
Required: Yes

## Request Body


The request accepts the following data in JSON format.

 ** [SessionId](#API_connect-participant_CancelParticipantAuthentication_RequestSyntax) **   <a name="connect-connect-participant_CancelParticipantAuthentication-request-SessionId"></a>
The `sessionId` provided in the `authenticationInitiated` event.  
Type: String  
Length Constraints: Fixed length of 36.  
Required: Yes

## Response Syntax


```
HTTP/1.1 200
```

## Response Elements


If the action is successful, the service sends back an HTTP 200 response with an empty HTTP body.

## Errors


For information about the errors that are common to all actions, see [Common Errors](CommonErrors.md).

 ** AccessDeniedException **   
You do not have sufficient access to perform this action.  
HTTP Status Code: 403

 ** InternalServerException **   
This exception occurs when there is an internal failure in the Amazon Connect service.  
HTTP Status Code: 500

 ** ThrottlingException **   
The request was denied due to request throttling.  
HTTP Status Code: 429

 ** ValidationException **   
The input fails to satisfy the constraints specified by Amazon Connect.  
HTTP Status Code: 400

## See Also


For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS Command Line Interface V2](https://docs.aws.amazon.com/goto/cli2/connectparticipant-2018-09-07/CancelParticipantAuthentication) 
+  [AWS SDK for .NET V4](https://docs.aws.amazon.com/goto/DotNetSDKV4/connectparticipant-2018-09-07/CancelParticipantAuthentication) 
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/connectparticipant-2018-09-07/CancelParticipantAuthentication) 
+  [AWS SDK for Go v2](https://docs.aws.amazon.com/goto/SdkForGoV2/connectparticipant-2018-09-07/CancelParticipantAuthentication) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/connectparticipant-2018-09-07/CancelParticipantAuthentication) 
+  [AWS SDK for JavaScript V3](https://docs.aws.amazon.com/goto/SdkForJavaScriptV3/connectparticipant-2018-09-07/CancelParticipantAuthentication) 
+  [AWS SDK for Kotlin](https://docs.aws.amazon.com/goto/SdkForKotlin/connectparticipant-2018-09-07/CancelParticipantAuthentication) 
+  [AWS SDK for PHP V3](https://docs.aws.amazon.com/goto/SdkForPHPV3/connectparticipant-2018-09-07/CancelParticipantAuthentication) 
+  [AWS SDK for Python](https://docs.aws.amazon.com/goto/boto3/connectparticipant-2018-09-07/CancelParticipantAuthentication) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/connectparticipant-2018-09-07/CancelParticipantAuthentication)